Main Page | See live article | Alphabetical index IRS is short for U.S. Internal Revenue Service short for Independent rear suspension, used in automobiles. This is a disambiguation page; that is, one that just points to other pages that might otherwise have the same name. If you followed a link here, you might want to go back and fix that link to point to the appropriate specific page. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.